ACT Extragalactic Southern Sources: 695 Objects from Multi-Frequency Observations

The ACTSOUTH catalog is a multi-frequency, multi-epoch catalog of 695 extragalactic sources based on observations from the Atacama Cosmology Telescope in 2008-2010. It covers a sky area of approximately 600 square degrees and classifies sources into 374 synchrotron and 321 dusty emitters. NASA HEASARC ingested this table in November 2023 from the LAMBDA archive.

Use Cases

• Classifying extragalactic sources as synchrotron or dusty emitters based on their spectral behavior between 150-220 GHz.
• Cross-matching millimeter-wave sources with existing catalogs from radio to X-ray wavelengths to identify new candidates.
• Analyzing the properties of 232 dusty source candidates not present in other catalogs.
• Studying source variability using multi-epoch observations from 2008, 2009, and 2010.

Strengths

• Contains 695 sources with classifications for 374 synchrotron and 321 dusty emitters.
• Based on multi-frequency (150, 220, 280 GHz) and multi-epoch observations over three years.
• Covers a significant sky area of approximately 600 square degrees.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

NASA HEASARC, sourced from the LAMBDA archive.

Collection Method

Observations from the Millimeter Bolometric Array Camera on the Atacama Cosmology Telescope, cross-matched from 11 sub-catalogs.

Time Range

Observations carried out in 2008, 2009, and 2010.

Freshness

Last updated 2026-03-13 19:23:53.107282; freshness should be verified.

Geography

Southern sky, covering approximately 600 square degrees.